uTools-Manuals/docs/java/javax/xml/crypto/dsig/TransformService.html

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     javax.xml.crypto.dsig 
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<h2 class="title" title="Class TransformService">Class TransformService</h2>
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         All Implemented Interfaces: 
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<span><a href="../../../../javax/xml/crypto/AlgorithmMethod.html" title="javax.xml.crypto中的接口">AlgorithmMethod</a> ， <a href="../../../../javax/xml/crypto/dsig/Transform.html" title="javax.xml.crypto.dsig中的接口">Transform</a> ， <a href="../../../../javax/xml/crypto/XMLStructure.html" title="javax.xml.crypto中的接口">XMLStructure</a></span>
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<hr/> <br/> <pre>public abstract class <span class="typeNameLabel">TransformService</span>
extends <a href="../../../../java/lang/Object.html" title="class in java.lang">Object</a>
implements <a href="../../../../javax/xml/crypto/dsig/Transform.html" title="interface in javax.xml.crypto.dsig">Transform</a></pre>
<div class="block">
<span>用于变换和规范化算法的服务提供程序接口。</span>
<p> <span><code>TransformService</code>每个实例<code>TransformService</code>支持特定的转换或规范化算法和XML机制类型。</span> <span>要创建一个<code>TransformService</code> ，请调用静态<a href="../../../../javax/xml/crypto/dsig/TransformService.html#getInstance-java.lang.String-java.lang.String-"><code>getInstance</code></a>方法之一，传递算法URI和XML机制类型，例如：</span> </p>
<blockquote>
<span><code> TransformService ts = TransformService.getInstance(Transform.XPATH2, "DOM"); </code></span>
</blockquote>
<p> <span><code>TransformService</code>机制注册和加载<a href="../../../../java/security/Provider.html" title="java.security中的类">TransformService</a>实现。</span> <span>每个<code>TransformService</code>服务提供商实现应包括一个<code>MechanismType</code>服务属性，用于标识其支持的XML机制类型。</span> <span>如果未指定属性，则假定为“DOM”。</span> <span>例如，支持XPath Filter 2 Transform和DOM机制的服务提供商将在<code>Provider</code>子类中<code>Provider</code>为：</span> </p>
<pre>  <span>put("TransformService." + Transform.XPATH2,
         "org.example.XPath2TransformService");
     put("TransformService." + Transform.XPATH2 + " MechanismType", "DOM");</span> </pre>
<span><code>TransformService</code>支持DOM机制类型的实现必须遵守API概述的<a href="../../../../../technotes/guides/security/xmldsig/overview.html#DOM Mechanism Requirements">DOM Mechanism Requirements</a>部分中定义的DOM互操作性要求。</span>
<span>有关标准机制类型的列表，请参阅API概述的<a href="../../../../../technotes/guides/security/xmldsig/overview.html#Service Provider">Service Providers</a>部分。</span>
<p> <span>一旦创建了一个<code>TransformService</code> ，它可以用于处理<code>Transform</code>或<code>CanonicalizationMethod</code>对象。</span> <span>如果<code>Transform</code>或<code>CanonicalizationMethod</code>以XML格式存在（例如，当验证现有的<code>XMLSignature</code> ）时，必须首先调用<a href="../../../../javax/xml/crypto/dsig/TransformService.html#init-javax.xml.crypto.XMLStructure-javax.xml.crypto.XMLCryptoContext-"><code>init(XMLStructure, XMLCryptoContext)</code></a>方法来初始化转换并提供文档上下文（即使没有参数）。</span> <span>或者，如果从头开始创建<code>Transform</code>或<code>CanonicalizationMethod</code> ，则<a href="../../../../javax/xml/crypto/dsig/TransformService.html#init-javax.xml.crypto.dsig.spec.TransformParameterSpec-">调用<code>init(TransformParameterSpec)</code></a>方法以使用参数初始化变换，并调用<a href="../../../../javax/xml/crypto/dsig/TransformService.html#marshalParams-javax.xml.crypto.XMLStructure-javax.xml.crypto.XMLCryptoContext-"><code>marshalParams</code></a>方法将参数编组为XML并提供带文档上下文的转换。</span> <span>最后，调用<a href="../../../../javax/xml/crypto/dsig/Transform.html#transform-javax.xml.crypto.Data-javax.xml.crypto.XMLCryptoContext-"><code>transform</code></a>方法来执行转换。</span> </p>
<p> <span><b>并发访问</b></span> </p>
<p> <span>该类的静态方法保证线程安全。</span> <span>多个线程可以同时调用此类中定义的静态方法，而不会产生不良影响。</span> </p>
<p> <span>但是，对于此类定义的非静态方法，这不是真的。</span> <span>除非特定提供者另有说明，否则需要同时访问单个<code>TransformService</code>实例的线程应在其间同步并提供必要的锁定。</span> <span>多个线程每个操作不同的<code>TransformService</code>实例不需要同步。</span> </p>
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<dl>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
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<dd>
         1.6 
       </dd>
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<span>构造方法</span>
<span class="tabEnd"> </span>
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<th class="colFirst" scope="col">Modifier</th>
<th class="colLast" scope="col">Constructor and Description</th>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/xml/crypto/dsig/TransformService.html#TransformService--">TransformService</a></span>()</code>
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              默认构造函数，用于由子类调用。 
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<caption>
<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t1"><span><a href="javascript:show(1);">静态方法</a></span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t2"><span><a href="javascript:show(2);">接口方法</a></span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t3"><span><a href="javascript:show(4);">抽象方法</a></span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t4"><span><a href="javascript:show(8);">具体的方法</a></span><span class="tabEnd"> </span></span>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code><a href="../../../../java/lang/String.html" title="class in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/xml/crypto/dsig/TransformService.html#getAlgorithm--">getAlgorithm</a></span>()</code>
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              返回此 
             <code>TransformService</code>支持的算法的URI。 
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<tr class="rowColor" id="i1">
<td class="colFirst"><code>static <a href="../../../../javax/xml/crypto/dsig/TransformService.html" title="class in javax.xml.crypto.dsig">TransformService</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/xml/crypto/dsig/TransformService.html#getInstance-java.lang.String-java.lang.String-">getInstance</a></span>(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> algorithm, <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> mechanismType)</code>
<div class="block">
              返回一个 
             <code>TransformService</code>支持指定算法URI（例如： 
             <a href="../../../../javax/xml/crypto/dsig/Transform.html#XPATH2"><code>Transform.XPATH2</code></a> ）和机制类型（比如：DOM）。 
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<tr class="altColor" id="i2">
<td class="colFirst"><code>static <a href="../../../../javax/xml/crypto/dsig/TransformService.html" title="class in javax.xml.crypto.dsig">TransformService</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/xml/crypto/dsig/TransformService.html#getInstance-java.lang.String-java.lang.String-java.security.Provider-">getInstance</a></span>(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> algorithm, <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> mechanismType, <a href="../../../../java/security/Provider.html" title="class in java.security">Provider</a> provider)</code>
<div class="block">
              返回支持由指定提供 
             <code>TransformService</code>提供的指定算法URI（例如： 
             <a href="../../../../javax/xml/crypto/dsig/Transform.html#XPATH2"><code>Transform.XPATH2</code></a> ）和机制类型（例如：DOM）的TransformService。 
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<tr class="rowColor" id="i3">
<td class="colFirst"><code>static <a href="../../../../javax/xml/crypto/dsig/TransformService.html" title="class in javax.xml.crypto.dsig">TransformService</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/xml/crypto/dsig/TransformService.html#getInstance-java.lang.String-java.lang.String-java.lang.String-">getInstance</a></span>(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> algorithm, <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> mechanismType, <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> provider)</code>
<div class="block">
              返回支持由指定提供 
             <code>TransformService</code>提供的指定算法URI（例如： 
             <a href="../../../../javax/xml/crypto/dsig/Transform.html#XPATH2"><code>Transform.XPATH2</code></a> ）和机制类型（例如：DOM）的TransformService。 
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<tr class="altColor" id="i4">
<td class="colFirst"><code><a href="../../../../java/lang/String.html" title="class in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/xml/crypto/dsig/TransformService.html#getMechanismType--">getMechanismType</a></span>()</code>
<div class="block">
              返回此支持的机制类型 
             <code>TransformService</code> 。 
            </div> </td>
</tr>
<tr class="rowColor" id="i5">
<td class="colFirst"><code><a href="../../../../java/security/Provider.html" title="class in java.security">Provider</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/xml/crypto/dsig/TransformService.html#getProvider--">getProvider</a></span>()</code>
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              返回此 
             <code>TransformService</code>的提供者。 
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<tr class="altColor" id="i6">
<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/xml/crypto/dsig/TransformService.html#init-javax.xml.crypto.dsig.spec.TransformParameterSpec-">init</a></span>(<a href="../../../../javax/xml/crypto/dsig/spec/TransformParameterSpec.html" title="interface in javax.xml.crypto.dsig.spec">TransformParameterSpec</a> params)</code>
<div class="block">
              初始化此 
             <code>TransformService</code>使用指定的参数。 
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<tr class="rowColor" id="i7">
<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/xml/crypto/dsig/TransformService.html#init-javax.xml.crypto.XMLStructure-javax.xml.crypto.XMLCryptoContext-">init</a></span>(<a href="../../../../javax/xml/crypto/XMLStructure.html" title="interface in javax.xml.crypto">XMLStructure</a> parent, <a href="../../../../javax/xml/crypto/XMLCryptoContext.html" title="interface in javax.xml.crypto">XMLCryptoContext</a> context)</code>
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              使用指定的参数和文档上下文初始化此 
             <code>TransformService</code> 。 
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<tr class="altColor" id="i8">
<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/xml/crypto/dsig/TransformService.html#marshalParams-javax.xml.crypto.XMLStructure-javax.xml.crypto.XMLCryptoContext-">marshalParams</a></span>(<a href="../../../../javax/xml/crypto/XMLStructure.html" title="interface in javax.xml.crypto">XMLStructure</a> parent, <a href="../../../../javax/xml/crypto/XMLCryptoContext.html" title="interface in javax.xml.crypto">XMLCryptoContext</a> context)</code>
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              协调算法特定的参数。 
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<li class="blockList"> <h4>TransformService</h4> <pre>protected TransformService()</pre>
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            默认构造函数，用于由子类调用。 
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<li class="blockList"> <h4>getInstance</h4> <pre>public static <a href="../../../../javax/xml/crypto/dsig/TransformService.html" title="class in javax.xml.crypto.dsig">TransformService</a> getInstance(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> algorithm,
                                           <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> mechanismType)
                                    throws <a href="../../../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></pre>
<div class="block">
<span>返回一个<code>TransformService</code>支持指定算法URI（例如： <a href="../../../../javax/xml/crypto/dsig/Transform.html#XPATH2"><code>Transform.XPATH2</code></a> ）和机制类型（比如：DOM）。</span>
<p> <span>此方法使用标准的JCA提供查找机制来查找并实例化<code>TransformService</code>实现期望的算法和<code>MechanismType</code>服务属性。</span> <span>它通过注册安全性列表<code>Provider</code> s，从最优选的<code>Provider</code> 。</span> <span>返回支持指定算法和机制类型的第一个<code>Provider</code>新的<code>TransformService</code>对象。</span> </p>
<p> <span>请注意，注册提供商的列表可以通过<a href="../../../../java/security/Security.html#getProviders--"><code>Security.getProviders()</code></a>方法<a href="../../../../java/security/Security.html#getProviders--">检索</a> 。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>algorithm</code> - 
            <code>algorithm</code>的URI 
           </dd>
<dd>
<code>mechanismType</code> - XML处理机制和表示的类型 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             一个新的 
            <code>TransformService</code>
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果 
            <code>algorithm</code>或 
            <code>mechanismType</code>是 
            <code>null</code>
</dd>
<dd>
<code><a href="../../../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></code> -如果没有 
            <code>Provider</code>支持 
            <code>TransformService</code>实现指定算法和机制类型 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../../../java/security/Provider.html" title="java.security中的类"><code>Provider</code></a></span>
</dd>
</dl> </li>
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<li class="blockList"> <h4>getInstance</h4> <pre>public static <a href="../../../../javax/xml/crypto/dsig/TransformService.html" title="class in javax.xml.crypto.dsig">TransformService</a> getInstance(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> algorithm,
                                           <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> mechanismType,
                                           <a href="../../../../java/security/Provider.html" title="class in java.security">Provider</a> provider)
                                    throws <a href="../../../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></pre>
<div class="block">
<span>返回支持由指定提供<code>TransformService</code>提供的指定算法URI（例如： <a href="../../../../javax/xml/crypto/dsig/Transform.html#XPATH2"><code>Transform.XPATH2</code></a> ）和机制类型（例如：DOM）的TransformService。</span>
<span>请注意，指定的<code>Provider</code>对象不必在提供者列表中注册。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>algorithm</code> - 
            <code>algorithm</code>的URI 
           </dd>
<dd>
<code>mechanismType</code> - XML处理机制和表示的类型 
           </dd>
<dd>
<code>provider</code> - 
            <code>Provider</code>对象 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             一个新的 
            <code>TransformService</code>
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> -如果 
            <code>provider</code> ， 
            <code>algorithm</code> ，或 
            <code>mechanismType</code>是 
            <code>null</code>
</dd>
<dd>
<code><a href="../../../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></code> -如果 
            <code>TransformService</code>执行指定算法和机制类型不是从指定 
            <code>Provider</code>对象 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../../../java/security/Provider.html" title="java.security中的类"><code>Provider</code></a></span>
</dd>
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<li class="blockList"> <h4>getInstance</h4> <pre>public static <a href="../../../../javax/xml/crypto/dsig/TransformService.html" title="class in javax.xml.crypto.dsig">TransformService</a> getInstance(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> algorithm,
                                           <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> mechanismType,
                                           <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> provider)
                                    throws <a href="../../../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a>,
                                           <a href="../../../../java/security/NoSuchProviderException.html" title="class in java.security">NoSuchProviderException</a></pre>
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<span>返回支持由指定提供<code>TransformService</code>提供的指定算法URI（例如： <a href="../../../../javax/xml/crypto/dsig/Transform.html#XPATH2"><code>Transform.XPATH2</code></a> ）和机制类型（例如：DOM）的TransformService。</span>
<span>指定的提供者必须在安全提供程序列表中注册。</span>
<p> <span>请注意，注册提供商的列表可以通过<a href="../../../../java/security/Security.html#getProviders--"><code>Security.getProviders()</code></a>方法<a href="../../../../java/security/Security.html#getProviders--">检索</a> 。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>algorithm</code> - 
            <code>algorithm</code>的URI 
           </dd>
<dd>
<code>mechanismType</code> - XML处理机制和表示的类型 
           </dd>
<dd>
<code>provider</code> - 提供者的字符串名称 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             一个新的 
            <code>TransformService</code>
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../../java/security/NoSuchProviderException.html" title="class in java.security">NoSuchProviderException</a></code> - 如果指定的提供程序未在安全提供程序列表中注册 
           </dd>
<dd>
<code><a href="../../../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> -如果 
            <code>provider</code> ， 
            <code>mechanismType</code> ，或 
            <code>algorithm</code>是 
            <code>null</code>
</dd>
<dd>
<code><a href="../../../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></code> -如果 
            <code>TransformService</code>实现指定算法和机制类型是不能从指定的供应商 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../../../java/security/Provider.html" title="java.security中的类"><code>Provider</code></a></span>
</dd>
</dl> </li>
</ul> <a name="getMechanismType--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getMechanismType</h4> <pre>public final <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> getMechanismType()</pre>
<div class="block">
            返回此支持的机制类型 
           <code>TransformService</code> 。 
          </div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             机制类型 
           </dd>
</dl> </li>
</ul> <a name="getAlgorithm--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getAlgorithm</h4> <pre>public final <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> getAlgorithm()</pre>
<div class="block">
            返回此 
           <code>TransformService</code>支持的算法的URI。 
          </div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../../javax/xml/crypto/AlgorithmMethod.html#getAlgorithm--">getAlgorithm</a></code>在界面 
            <code><a href="../../../../javax/xml/crypto/AlgorithmMethod.html" title="interface in javax.xml.crypto">AlgorithmMethod</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             算法URI 
           </dd>
</dl> </li>
</ul> <a name="getProvider--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getProvider</h4> <pre>public final <a href="../../../../java/security/Provider.html" title="class in java.security">Provider</a> getProvider()</pre>
<div class="block">
            返回此 
           <code>TransformService</code>的提供者。 
          </div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             提供者 
           </dd>
</dl> </li>
</ul> <a name="init-javax.xml.crypto.dsig.spec.TransformParameterSpec-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>init</h4> <pre>public abstract void init(<a href="../../../../javax/xml/crypto/dsig/spec/TransformParameterSpec.html" title="interface in javax.xml.crypto.dsig.spec">TransformParameterSpec</a> params)
                   throws <a href="../../../../java/security/InvalidAlgorithmParameterException.html" title="class in java.security">InvalidAlgorithmParameterException</a></pre>
<div class="block">
<span>初始化此<code>TransformService</code>使用指定的参数。</span>
<p> <span>如果以XML形式存在参数，则应使用<a href="../../../../javax/xml/crypto/dsig/TransformService.html#init-javax.xml.crypto.XMLStructure-javax.xml.crypto.XMLCryptoContext-"><code>init(XMLStructure, XMLCryptoContext)</code></a>方法初始化<code>TransformService</code> 。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>params</code> - 算法参数（如果不需要或可选，可以是 
            <code>null</code> ） 
           </dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../../java/security/InvalidAlgorithmParameterException.html" title="class in java.security">InvalidAlgorithmParameterException</a></code> - 如果指定的参数对于该算法无效 
           </dd>
</dl> </li>
</ul> <a name="marshalParams-javax.xml.crypto.XMLStructure-javax.xml.crypto.XMLCryptoContext-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>marshalParams</h4> <pre>public abstract void marshalParams(<a href="../../../../javax/xml/crypto/XMLStructure.html" title="interface in javax.xml.crypto">XMLStructure</a> parent,
                                   <a href="../../../../javax/xml/crypto/XMLCryptoContext.html" title="interface in javax.xml.crypto">XMLCryptoContext</a> context)
                            throws <a href="../../../../javax/xml/crypto/MarshalException.html" title="class in javax.xml.crypto">MarshalException</a></pre>
<div class="block">
<span>协调算法特定的参数。</span>
<span>如果没有要编组的参数，则此方法返回而不会抛出异常。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>parent</code> - 一个机制特定的结构，包含编组参数应附加到的父节点 
           </dd>
<dd>
<code>context</code> -所述 
            <code>XMLCryptoContext</code>含有附加上下文（可以是 
            <code>null</code>如果不适用） 
           </dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../../java/lang/ClassCastException.html" title="class in java.lang">ClassCastException</a></code> - 如果 
            <code>parent</code>或 
            <code>context</code>的类型与此 
            <code>TransformService</code>不 
            <code>TransformService</code>
</dd>
<dd>
<code><a href="../../../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果 
            <code>parent</code>是 
            <code>null</code>
</dd>
<dd>
<code><a href="../../../../javax/xml/crypto/MarshalException.html" title="class in javax.xml.crypto">MarshalException</a></code> - 如果参数无法编组 
           </dd>
</dl> </li>
</ul> <a name="init-javax.xml.crypto.XMLStructure-javax.xml.crypto.XMLCryptoContext-">
<!-- --> </a>
<ul class="blockListLast">
<li class="blockList"> <h4>init</h4> <pre>public abstract void init(<a href="../../../../javax/xml/crypto/XMLStructure.html" title="interface in javax.xml.crypto">XMLStructure</a> parent,
                          <a href="../../../../javax/xml/crypto/XMLCryptoContext.html" title="interface in javax.xml.crypto">XMLCryptoContext</a> context)
                   throws <a href="../../../../java/security/InvalidAlgorithmParameterException.html" title="class in java.security">InvalidAlgorithmParameterException</a></pre>
<div class="block">
            使用指定的参数和文档上下文初始化此 
           <code>TransformService</code> 。 
          </div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>parent</code> - 包含父结构的机制特定结构 
           </dd>
<dd>
<code>context</code> -所述 
            <code>XMLCryptoContext</code>含有附加上下文（可以是 
            <code>null</code>如果不适用） 
           </dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../../java/lang/ClassCastException.html" title="class in java.lang">ClassCastException</a></code> - 如果 
            <code>parent</code>或 
            <code>context</code>的类型与此 
            <code>TransformService</code>不 
            <code>TransformService</code>
</dd>
<dd>
<code><a href="../../../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果 
            <code>parent</code>是 
            <code>null</code>
</dd>
<dd>
<code><a href="../../../../java/security/InvalidAlgorithmParameterException.html" title="class in java.security">InvalidAlgorithmParameterException</a></code> - 如果指定的参数对于该算法无效 
           </dd>
</dl> </li>
</ul> </li>
</ul> </li>
</ul>
</div>
</div>