< prev index next >

src/java.xml/share/classes/com/sun/org/apache/xalan/internal/xsltc/compiler/WithParam.java

Print this page
rev 886 : 8150704: XALAN: ERROR: 'No more DTM IDs are available' when transforming with lots of temporary result trees

@@ -1,8 +1,7 @@
 /*
- * reserved comment block
- * DO NOT REMOVE OR ALTER!
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
  */
 /*
  * Copyright 2001-2004 The Apache Software Foundation.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");

@@ -15,19 +14,21 @@
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/*
- * $Id: WithParam.java,v 1.2.4.1 2005/09/12 11:38:01 pvedula Exp $
- */
 
 package com.sun.org.apache.xalan.internal.xsltc.compiler;
 
+import com.sun.org.apache.bcel.internal.generic.ALOAD;
+import com.sun.org.apache.bcel.internal.generic.ASTORE;
+import com.sun.org.apache.bcel.internal.generic.CHECKCAST;
 import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
+import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
 import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
 import com.sun.org.apache.bcel.internal.generic.InstructionList;
+import com.sun.org.apache.bcel.internal.generic.LocalVariableGen;
 import com.sun.org.apache.bcel.internal.generic.PUSH;
 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ReferenceType;

@@ -58,10 +59,15 @@
      * Parameter's default value.
      */
     private Expression _select;
 
     /**
+     * Reference to JVM variable holding temporary result tree.
+     */
+    private LocalVariableGen _domAdapter;
+
+    /**
      * %OPT% This is set to true when the WithParam is used in a CallTemplate
      * for a simple named template. If this is true, the parameters are
      * passed to the named template through method arguments rather than
      * using the expensive Translet.addParameter() call.
      */

@@ -162,12 +168,17 @@
         if (_select != null) {
             _select.translate(classGen, methodGen);
             _select.startIterator(classGen, methodGen);
         }
         // If not, compile result tree from parameter body if present.
+        // Store result tree into local variable for releasing it later
         else if (hasContents()) {
+            final InstructionList il = methodGen.getInstructionList();
             compileResultTree(classGen, methodGen);
+            _domAdapter = methodGen.addLocalVariable2("@" + _escapedName, Type.ResultTree.toJCType(), il.getEnd());
+            il.append(DUP);
+            il.append(new ASTORE(_domAdapter.getIndex()));
         }
         // If neither are present then store empty string in parameter slot
         else {
             final ConstantPoolGen cpg = classGen.getConstantPool();
             final InstructionList il = methodGen.getInstructionList();

@@ -206,6 +217,28 @@
         il.append(new INVOKEVIRTUAL(cpg.addMethodref(TRANSLET_CLASS,
                                                      ADD_PARAMETER,
                                                      ADD_PARAMETER_SIG)));
         il.append(POP); // cleanup stack
     }
+
+    /**
+     * Release the compiled result tree.
+     */
+    public void releaseResultTree(ClassGenerator classGen, MethodGenerator methodGen) {
+        if (_domAdapter != null) {
+            final ConstantPoolGen cpg = classGen.getConstantPool();
+            final InstructionList il = methodGen.getInstructionList();
+            if (classGen.getStylesheet().callsNodeset() && classGen.getDOMClass().equals(MULTI_DOM_CLASS)) {
+                final int removeDA = cpg.addMethodref(MULTI_DOM_CLASS, "removeDOMAdapter", "(" + DOM_ADAPTER_SIG + ")V");
+                il.append(methodGen.loadDOM());
+                il.append(new CHECKCAST(cpg.addClass(MULTI_DOM_CLASS)));
+                il.append(new ALOAD(_domAdapter.getIndex()));
+                il.append(new CHECKCAST(cpg.addClass(DOM_ADAPTER_CLASS)));
+                il.append(new INVOKEVIRTUAL(removeDA));
+            }
+            final int release = cpg.addInterfaceMethodref(DOM_IMPL_CLASS, "release", "()V");
+            il.append(new ALOAD(_domAdapter.getIndex()));
+            il.append(new INVOKEINTERFACE(release, 1));
+            _domAdapter = null;
+         }
+     }
 }
< prev index next >