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java/org/apache/jasper/compiler/Mark.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (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.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * 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.
+ */
+package org.apache.jasper.compiler;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import org.apache.jasper.JspCompilationContext;
+
+/**
+ * Mark represents a point in the JSP input.
+ *
+ * @author Anil K. Vijendran
+ */
+final class Mark {
+
+    // position within current stream
+    int cursor, line, col;
+
+    // current stream
+    char[] stream = null;
+
+    // name of the current file
+    private String fileName;
+
+    private JspCompilationContext ctxt;
+
+    /**
+     * Constructor
+     *
+     * @param reader JspReader this mark belongs to
+     * @param inStream current stream for this mark
+     * @param name JSP file name
+     */
+    Mark(JspReader reader, char[] inStream, String name) {
+        this.ctxt = reader.getJspCompilationContext();
+        this.stream = inStream;
+        this.cursor = 0;
+        this.line = 1;
+        this.col = 1;
+        this.fileName = name;
+    }
+
+
+    /**
+     * Constructor
+     */
+    Mark(Mark other) {
+       init(other, false);
+    }
+
+    void update(int cursor, int line, int col) {
+        this.cursor = cursor;
+        this.line = line;
+        this.col = col;
+    }
+
+    void init(Mark other, boolean singleFile) {
+        this.cursor = other.cursor;
+        this.line = other.line;
+        this.col = other.col;
+
+        if (!singleFile) {
+            this.ctxt = other.ctxt;
+            this.stream = other.stream;
+            this.fileName = other.fileName;
+        }
+    }
+
+
+    /**
+     * Constructor
+     */
+    Mark(JspCompilationContext ctxt, String filename, int line, int col) {
+        this.ctxt = ctxt;
+        this.stream = null;
+        this.cursor = 0;
+        this.line = line;
+        this.col = col;
+        this.fileName = filename;
+    }
+
+
+    public int getLineNumber() {
+        return line;
+    }
+
+    public int getColumnNumber() {
+        return col;
+    }
+
+    @Override
+    public String toString() {
+        return getFile()+"("+line+","+col+")";
+    }
+
+    public String getFile() {
+        return this.fileName;
+    }
+
+    /**
+     * Gets the URL of the resource with which this Mark is associated
+     *
+     * @return URL of the resource with which this Mark is associated
+     *
+     * @exception MalformedURLException if the resource pathname is incorrect
+     */
+    public URL getURL() throws MalformedURLException {
+        return ctxt.getResource(getFile());
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof Mark) {
+            Mark m = (Mark) other;
+            return this.cursor == m.cursor && this.line == m.line && this.col == m.col;
+        }
+        return false;
+    }
+
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + col;
+        result = prime * result + cursor;
+        result = prime * result + line;
+        return result;
+    }
+}