1 /*
2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
3 * @LastModified: Oct 2017
4 */
5 /*
6 * Licensed to the Apache Software Foundation (ASF) under one or more
7 * contributor license agreements. See the NOTICE file distributed with
8 * this work for additional information regarding copyright ownership.
9 * The ASF licenses this file to You under the Apache License, Version 2.0
10 * (the "License"); you may not use this file except in compliance with
11 * the License. You may obtain a copy of the License at
12 *
13 * http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 */
21
22 package com.sun.org.apache.xalan.internal.xsltc.compiler;
23
35 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.BooleanType;
36 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
37 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.FilterGenerator;
38 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.IntType;
39 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
40 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NumberType;
41 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ReferenceType;
42 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ResultTreeType;
43 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TestGenerator;
44 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
45 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
46 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
47 import com.sun.org.apache.xalan.internal.xsltc.runtime.Operators;
48 import java.util.ArrayList;
49 import java.util.List;
50
51 /**
52 * @author Jacek Ambroziak
53 * @author Santiago Pericas-Geertsen
54 * @author Morten Jorgensen
55 */
56 final class Predicate extends Expression implements Closure {
57
58 /**
59 * The predicate's expression.
60 */
61 private Expression _exp = null;
62
63 /**
64 * This flag indicates if optimizations are turned on. The
65 * method <code>dontOptimize()</code> can be called to turn
66 * optimizations off.
67 */
68 private boolean _canOptimize = true;
69
70 /**
71 * Flag indicatig if the nth position optimization is on. It
72 * is set in <code>typeCheck()</code>.
73 */
74 private boolean _nthPositionFilter = false;
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1 /*
2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
3 */
4 /*
5 * Licensed to the Apache Software Foundation (ASF) under one or more
6 * contributor license agreements. See the NOTICE file distributed with
7 * this work for additional information regarding copyright ownership.
8 * The ASF licenses this file to You under the Apache License, Version 2.0
9 * (the "License"); you may not use this file except in compliance with
10 * the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 package com.sun.org.apache.xalan.internal.xsltc.compiler;
22
34 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.BooleanType;
35 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
36 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.FilterGenerator;
37 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.IntType;
38 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
39 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NumberType;
40 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ReferenceType;
41 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ResultTreeType;
42 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TestGenerator;
43 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
44 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
45 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
46 import com.sun.org.apache.xalan.internal.xsltc.runtime.Operators;
47 import java.util.ArrayList;
48 import java.util.List;
49
50 /**
51 * @author Jacek Ambroziak
52 * @author Santiago Pericas-Geertsen
53 * @author Morten Jorgensen
54 * @LastModified: Oct 2017
55 */
56 final class Predicate extends Expression implements Closure {
57
58 /**
59 * The predicate's expression.
60 */
61 private Expression _exp = null;
62
63 /**
64 * This flag indicates if optimizations are turned on. The
65 * method <code>dontOptimize()</code> can be called to turn
66 * optimizations off.
67 */
68 private boolean _canOptimize = true;
69
70 /**
71 * Flag indicatig if the nth position optimization is on. It
72 * is set in <code>typeCheck()</code>.
73 */
74 private boolean _nthPositionFilter = false;
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