package net.sf.saxon.style;
import net.sf.saxon.expr.*;
import net.sf.saxon.instruct.*;
import net.sf.saxon.om.AttributeCollection;
import net.sf.saxon.om.Axis;
import net.sf.saxon.om.StandardNames;
import net.sf.saxon.om.Validation;
import net.sf.saxon.pattern.NodeKindTest;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.SchemaType;
import net.sf.saxon.value.SequenceType;
import net.sf.saxon.value.Whitespace;
/**
* Handler for xsl:copy elements in stylesheet. <br>
*/
public class XSLCopy extends StyleElement {
private String use; // value of use-attribute-sets attribute
private AttributeSet[] attributeSets = null;
private boolean copyNamespaces = true;
private boolean inheritNamespaces = true;
private int validationAction = Validation.PRESERVE;
private SchemaType schemaType = null;
/**
* Determine whether this node is an instruction.
* @return true - it is an instruction
*/
public boolean isInstruction() {
return true;
}
/**
* Determine whether this type of element is allowed to contain a template-body
* @return true: yes, it may contain a template-body
*/
public boolean mayContainSequenceConstructor() {
return true;
}
public void prepareAttributes() throws XPathException {
AttributeCollection atts = getAttributeList();
String copyNamespacesAtt = null;
String validationAtt = null;
String typeAtt = null;
String inheritAtt = null;
for (int a=0; a<atts.getLength(); a++) {
int nc = atts.getNameCode(a);
String f = getNamePool().getClarkName(nc);
if (f.equals(StandardNames.USE_ATTRIBUTE_SETS)) {
use = atts.getValue(a);
} else if (f.equals(StandardNames.COPY_NAMESPACES)) {
copyNamespacesAtt = Whitespace.trim(atts.getValue(a));
} else if (f.equals(StandardNames.TYPE)) {
typeAtt = Whitespace.trim(atts.getValue(a));
} else if (f.equals(StandardNames.VALIDATION)) {
validationAtt = Whitespace.trim(atts.getValue(a));
} else if (f.equals(StandardNames.INHERIT_NAMESPACES)) {
inheritAtt = Whitespace.trim(atts.getValue(a));
} else {
checkUnknownAttribute(nc);
}
}
if (copyNamespacesAtt == null) {
copyNamespaces = true;
} else {
if (copyNamespacesAtt.equals("yes")) {
copyNamespaces = true;
} else if (copyNamespacesAtt.equals("no")) {
copyNamespaces = false;
} else {
compileError("Value of copy-namespaces must be 'yes' or 'no'", "XTSE0020");
}
}
if (typeAtt != null && validationAtt != null) {
compileError("The type and validation attributes must not both be specified", "XTSE1505");
}
if (validationAtt != null) {
validationAction = Validation.getCode(validationAtt);
if (validationAction != Validation.STRIP && !getExecutable().isSchemaAware()) {
validationAction = Validation.STRIP;
compileError("To perform validation, a schema-aware XSLT processor is needed", "XTSE1660");
}
} else {
validationAction = getContainingStylesheet().getDefaultValidation();
}
if (typeAtt != null) {
schemaType = getSchemaType(typeAtt);
if (!getExecutable().isSchemaAware()) {
compileError("The @type attribute is available only with a schema-aware XSLT processor", "XTSE1660");
}
validationAction = Validation.BY_TYPE;
}
if (inheritAtt != null) {
if (inheritAtt.equals("yes")) {
inheritNamespaces = true;
} else if (inheritAtt.equals("no")) {
inheritNamespaces = false;
} else {
compileError("The @inherit-namespaces attribute has permitted values (yes, no)", "XTSE0020");
}
}
// if (validationAction == Validation.PRESERVE && !copyNamespaces) {
// // this is an error only when copying namespace-sensitive content
// compileError("copy-namespaces must be set to 'yes' when validation is set to 'preserve'", "XTTE0950");
// }
}
public void validate() throws XPathException {
if (use!=null) {
attributeSets = getAttributeSets(use, null); // find any referenced attribute sets
}
}
public Expression compile(Executable exec) throws XPathException {
Copy inst = new Copy(copyNamespaces,
inheritNamespaces,
schemaType,
validationAction);
Expression content = compileSequenceConstructor(exec, iterateAxis(Axis.CHILD), true);
if (attributeSets != null) {
UseAttributeSets use = new UseAttributeSets(attributeSets);
// The use-attribute-sets is ignored unless the context item is an element node. So we
// wrap the UseAttributeSets instruction in a conditional to perform a run-time test
Expression condition = new InstanceOfExpression(
new ContextItemExpression(),
SequenceType.makeSequenceType(NodeKindTest.ELEMENT, StaticProperty.EXACTLY_ONE));
Expression choice = Choose.makeConditional(condition, use);
if (content == null) {
content = choice;
} else {
content = Block.makeBlock(choice, content);
content.setLocationId(
allocateLocationId(getSystemId(), getLineNumber()));
}
}
if (content == null) {
content = Literal.makeEmptySequence();
}
inst.setContentExpression(content);
return inst;
}
}
//
// The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
// you may not use this file except in compliance with the License. You may obtain a copy of the
// License at http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is Michael H. Kay.
//
// Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
// Contributor(s): none.
//